- C3 Advisors
- Cain Brothers
- California Hospice Network
- California Pacific Medical Center
- Calvert Hospice
- Cambia Health Foundation
- Cambia Health Solutions
- Cambia Palliative Care Center of Excellence
- Canon Hospice
- Cap Doctor Associates
- Cape Cod Healthcare
- Capital Caring
- Capital Caring Health
- Capital City Hospice
- Capital One
- Capital Region Medical Center
- Care Alternatives
- Care at Heart
- Care Dimensions
- Care New England
